No 12v trigger on the Yamaha. That's why I'm using the switched outlet on the Yamaha for both the ICBM and the amp. The amp does have a 12v trigger, so a signal from a generic 12v DC source plugged into the receiver's switched outlet does fine. The ICBM does not have a 12v trigger, so a even if the Yamaha had a 12v trigger output, the ICBM would not have a place to receive it.

Thanks for the thoughts, though.